Purpose: The purposes of this study were to examine the level of anger, anger expression, depression, psychosomatic symptom and perceived health status, and to identify the influencing factors of anger expression in shelter residents. Methods: This study employed a descriptive correlational design. Data were collected from 407 homeless people residing at 27 shelters using structured instrument. Results: The level of anger expression was different by age, educational level, existence of children, and duration of shelter residency. Anger expression was significantly correlated with depression, psychosomatic symptoms and perceived health status. The predictors of high-level anger expression was younger age, low educational level, duration of shelter residency in Model 1 (F=6.884, p<.001, Adj. $R^2=.065$, and depression and psychosomatic symptoms in Model 2 (F=7.197, p<.001, Adj. $R^2=.113$. Conclusion: This study suggested that the homeless in the shelters had various psychological vulnerabilities, and therefore more individualized programs based on their needs and psychological health status should be provided for the homeless.